Method and device for distributing specific scheduling request resource

ABSTRACT

A method and device for distributing the specific scheduling request resources. The method includes: in the multi-carrier aggregation system, according to the set scheduling principle determine the terminal sending carrier resources which may be used by the specific scheduling, the carrier resources comprises the number of carrier and serial number, the carrier resources of the specific scheduling request resources are distributed and sent to the terminal on the determined carrier according to the set scheduling principle; the distributed carrier and time frequency resources which may be used on every carrier are informed to the terminal.

The present application is a US National Stage of InternationalApplication No. PCT/CN2010/072318, filed 29 Apr. 2010, designating theUnited States, and claiming priorities to Chinese Patent ApplicationsNo. 200910083408.9 filed 30 Apr. 2009 and No. 201010158488.2 filed 28Apr. 2010.

FIELD OF THE INVENTION

The present invention relates to the field of communications andparticularly to a method and device for allocating a dedicatedscheduling request resource.

BACKGROUND OF THE INVENTION

The Long Term Evolution (LTE)/Long Term Evolution-Advanced (LIE-A)system is a scheduling-based communication system, that is, if there isdata to be transmitted in the transmission buffer of a User Equipment(UE), the UE firstly transmits a Buffer Status Report (BSR) to a basestation to notify the base station of information of the data to betransmitted in the transmission buffer of the UE. Upon reception of theBSR transmitted from the UE, the base station will allocate the relatedUplink-Shared Channel (UL-SCH) resource to the UE according to theamount of the data to be transmitted of the UE and the service type andinstruct the UE to transmit the data on the allocated UL-SCH resource.

The UE transmits the BSR to the base station also on the Uplink-SharedChannel (UL-SCH) resource, and if there is a BSR to be transmitted butno uplink-shared channel resource is available, a Scheduling Requestwill be triggered to request the base station to allocate anuplink-shared channel resource for the BSR to be transmitted.

After the SR is triggered, the SR may be transmitted in either of twoways, i.e., the SR is transmitted on a Dedicated Scheduling Request(D-SR) resource or in a Random Access procedure (RA-SR). When the LTEand the base station are synchronized, there may be no available D-SRresource, and when they are unsynchronized, there must be no D-SRresource. D-SR resource is allocated by RRC signaling and transmits onPhysical Uplink Control Channel (PUCCH).

Generally, an SR is transmitted under such a fundamental principle thatno RA-SR will be used so long as the D-SR resource is available. And theSR can be transmitted repeatedly on the D-SR resource until the UE getsthe uplink-shared channel resource allocated by the base station.

In the LTE system, an uplink dedicated scheduling request is transmittedon PUCCH according to PUCCH format1/1a/1b for which a symbol is spreadin the frequency domain by being multiplied with a 12-bit cyclic shiftsequence to form a 12-bit sequence of symbols, which is in turn spreadin the time domain by being multiplied with a 4-bit orthogonal sequenceand mapped onto 12×4 time and frequency locations of a Physical ResourceBlock (PRB) on a timeslot, where three symbols are used for transmissionof a Reference Signal (RS), and different users borne on the same PRBare distinguished with different cyclic shift values for a fundamentalsequence.

In the system, a part of the PUCCH resource is typically reserved foreach subframe as a cell-specific SR resource so that the PUCCH resourceis shared amongst UEs in the cell and the base station allocates thecell-specific SR resource to the UEs in the cell according to a specificresource allocation strategy and notifies the D-SR PUCCH resource index,period and subframe offset to the UE by RRC signaling. The meanings ofparameters in the RRC signaling are depicted in Table 1, where the RRCsignaling includes sr-PUCCH-ResourceIndex, sr-ConfigurationIndex anddsr-TransMax, with their meanings as depicted in the table.

TABLE 1 Parameter The Meaning of Parameter sr-PUCCH- This parameterdesignates a resource index of a ResourceIndex PUCCH resource in asubframe, which is allocated to the UE for transmission of a D-SR.sr-ConfigurationIndex This parameter represents the period and subframeoffset by which a D-SR is transmitted, UE can determine its D-SRresource according to this parameter and the starting subframe of theD-SR resource. dsr-TransMax This parameter represents the maximum numberof transmissions that a D-SR can be transmitted, and the purpose ofintroducing this parameter is to improve the reliability of the D-SR.

The peak rates of the LTE-A are significantly increased compared withthe LTE system, and 1 Gbps in the downlink and 500 Mbps in the uplinkare required. Also the LTE-A system is required to be well compatiblewith the LTE system. Carrier Aggregation (CA) has been introduced to theLTE-A system in order to reach the increased peak rates, compatible withthe LTE system and full use of the spectrum resource.

Carrier aggregation means that UE can aggregate more than one cellsimultaneously, which is different from the legacy radio systems who canonly aggregate one cell at a time. In a system supporting carrieraggregation, component carriers may or may not be continuous, and forcompatibility with the LTE system, the maximum bandwidth of eachcomponent carriers is 20 MHz, and the bandwidths of different componentcarriers may be same or not.

As for the definition of a primary carrier, a plurality of componentcarriers may be supported in the uplink in the LTE-A system, and thereis no definite concept of a primary carrier so far, which may becell-specific or UE-specific. If the primary carrier is cell-specific,the primary carrier has to be supported by all of the R10 UEs; and ifthe primary carrier is UE-specific, the UE has to support its ownprimary carrier.

With the introduction of CA, a plurality of component carriers have tobe supported concurrently in the uplink, so how to configure aUE-specific D-SR resource shall be taken into account in the case of aplurality of component carriers, but a relevant description is absent inthe existing standards.

SUMMARY OF THE INVENTION

The invention provides a method and device for allocating a dedicatedscheduling request source to configure a UE-specific D-SR resource.

A method for allocating a dedicated scheduling request source accordingto an embodiment of the invention includes:

configuring a carrier resource in a system supporting carrieraggregation for a user equipment according to a preset schedulingcriterion, and allocating corresponding time and frequency resources onthe configured carrier resource, wherein the carrier resource togetherwith the time and frequency resources are regarded as a dedicatedscheduling request resource; and

notifying the user equipment of the carrier resource and/or the time andfrequency resources.

A device for allocating a dedicated scheduling request source accordingto an embodiment of the invention includes:

a resource allocation unit configured to configure a carrier resourcefor a user equipment according to a preset scheduling criterion, andallocate corresponding time and frequency resources on the configuredcarrier resource, wherein the carrier resource together with the timeand frequency resources are regarded as a dedicated scheduling requestresource; and

a notification unit configured to notify the user equipment of thecarrier resource and/or the time and frequency resources.

A method for transmitting a dedicated scheduling request according to anembodiment of the invention includes:

receiving, by a user equipment in a system supporting carrieraggregation, carrier information and corresponding time and frequencyresources information of a dedicated scheduling request resourcetransmitted from a base station; and

transmitting a dedicated scheduling request on the corresponding timeand frequency resources on the carrier designated by the base station.

A user equipment according to an embodiment of the invention includes:

a reception unit configured to receive carrier information andcorresponding time and frequency resources information of a dedicatedscheduling request resource transmitted from a base station; and

a dedicated scheduling request transmission unit configured to transmita dedicated scheduling request on the corresponding time and frequencieson the carrier designated by the base station.

In the embodiments of the invention, in a system supporting carrieraggregation, a carrier resource is chosen for a user equipment as adedicated scheduling request resource of the user equipment according toa preset scheduling criterion, and time and frequency resources on thechosen uplink component carrier are also allocated for the dedicatedscheduling request; and the user equipment is notified of the carrierresource and/or the time and frequency resources, thereby configuring inthe system supporting carrier aggregation the time and frequencyresources for a dedicated scheduling request of the user equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flow chart of a method for allocating a dedicatedscheduling request resource according to an embodiment of the invention;

FIG. 2 is a schematic flow chart of a first embodiment of allocating adedicated scheduling request resource according to the invention;

FIG. 3 is a schematic flow chart of a second embodiment of allocating adedicated scheduling request resource according to the invention;

FIG. 4 is a schematic flow chart of a third embodiment of allocating adedicated scheduling request resource according to the invention;

FIG. 5 is a schematic flow chart of a fourth embodiment of allocating adedicated scheduling request resource according to the invention;

FIG. 6 is a schematic diagram of switching a dedicated schedulingrequest resource on different uplink component carriers at differentmoments of time in the embodiment illustrated in FIG. 5;

FIG. 7 is a schematic flow chart of a method for transmitting adedicated scheduling request according to an embodiment of theinvention;

FIG. 8 is a schematic structural diagram of a device for allocating adedicated scheduling request resource according to an embodiment of theinvention; and

FIG. 9 is a schematic structural diagram of a user equipment accordingto an embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In embodiments of the invention, in a system supporting carrieraggregation, a carrier resource is configured for a user equipmentaccording to a preset scheduling criterion, and time and frequencyresources are allocated on the configured carrier resource, where thecarrier resource and the time and frequency resources are regarded as adedicated scheduling request resource; and

the user equipment is notified of the carrier resource and/or the timeand frequency resources.

Referring to FIG. 1, a method according to an embodiment of theinvention includes the following steps.

In a step 101, in a system supporting carrier aggregation, a carrierresource is configured for a user equipment according to a presetscheduling criterion, and time and frequency resources are allocated onthe configured carrier resource, where the carrier resource and/or thetime and frequency resources are regarded as a dedicated schedulingrequest resource.

Here a carrier resource may be chosen for the user equipment accordingto a preset scheduling criterion as follows: a carrier resource may bechosen randomly according to UE capability information of the userequipment, a carrier resource may be chosen according to a load balancecriterion, or a primary carrier may be chosen as a dedicated schedulingrequest resource of the user equipment. The chosen carrier resource mayinclude one or more uplink component carriers.

The dedicated scheduling request resource may include information ontime and frequency resources of one uplink component carrier allocatedto the user equipment at any moment of time or information on time andfrequency resources of a plurality of uplink component carriersallocated for the user equipment at any preset moment of time.

When a plurality of uplink component carriers are chosen, the userequipment may be configured to transmit a dedicated scheduling requeston each of the uplink component carriers, or the user equipment may beconfigured to transmit a dedicated scheduling request on only one uplinkcomponent carrier in one subframe and the chosen uplink componentcarriers can be used in turn at different subframes.

In a step 102, the user equipment is notified of the carrier resourceand/or the time and frequency resources.

Implementation solutions of the invention are detailed below inconnection with embodiments thereof.

Reference is made to FIG. 2 illustrating such an implementation solutionthat a base station chooses an uplink component carrier according to thecapability of the user equipment in the present embodiment as follows.

In a step 201, a base station determines uplink component carrierssupported by the user equipment according to capability informationreported from the user equipment. The capability information reportedfrom the user equipment includes information of the uplink componentcarriers supported by the user equipment.

In a step 202, one uplink component carrier is chosen randomly from theuplink component carriers supported by the user equipment as a carrierresource of a dedicated scheduling request of the user equipment.

In a step 203, a resource index of a PUCCH resource on which thededicated scheduling request is borne is allocated on the chosen uplinkcomponent carrier to the user equipment.

In a step 204, a period and an offset at which the user equipmenttransmits the dedicated scheduling request are determined for the userequipment. The resource index of the PUCCH resource allocated in thestep 203 and the period and offset determined in the step 204 are usedas information on time and frequency resources configured for the userequipment.

In a step 205, the user equipment is notified in an extended RRCsignaling of the chosen uplink component carrier and/or the informationon the configured time and frequency resources.

A component carrier indication field may be added to an existing RRCsignaling so that the extended RRC signaling includes a frequencyresource indication field and a time-frequency resource indicationfiled, and the frequency resource indication field is used to store thecarrier information for the dedicated scheduling request, and thetime-frequency resource indication filed is used to store the time andfrequency resources for the dedicated scheduling request. The time andfrequency resources include the resource index of the PUCCH resource,the period and offset for the dedicated scheduling request. The carrierinformation includes the index of the carrier on which the dedicatedscheduling request is transmitted or the frequency of the uplinkcomponent carrier. Furthermore, the RRC signaling may include themaximum number of transmissions that the dedicated scheduling requestcan be transmitted.

For example, the extended RRC signaling is depicted in Table 2.Referring to Table 2, in an embodiment of the invention, a parameter,i.e., an index of a UE-specific D-SR resource (sr-Componentcarrier), canbe added optionally compared with the SR configuration informationelements in the protocol of LTE Release 8 (R8), so that the extended RRCsignaling includes at least the UE-specific D-SR resource index(sr-Componetcarrier), and the period and offset (sr-ConfigurationIndex).Where sr-Componentcarrier represents the component carrier indexassigned for the D-SR, sr-ConfigurationIndex represents the period andthe subframe offset for transmission of a D-SR. The specific subframe inwhich a UE transmits a D-SR can be determined according to the parameterof sr-ConfigurationIndex and the starting subframe of a configured D-SRresource.

The RRC signaling may further include dsr-TransMax, which represents themaximum number of transmissions that a D-SR can be transmitted, and thepurpose of this parameter is to improve the reliability of the D-SR.

It shall be noted that if the chosen carrier resource is the primarycarrier, information indicating the carrier may not be carried in RRCsignaling.

TABLE 2 Parameter The Meaning of Parameter sr-PUCCH- The parameterdesignates a resource index of a ResourceIndex PUCCH resource in asubframe, which is allocated to the UE for transmission of a D-SR.sr-ConfigurationIndex The parameter represents a period and a subframeoffset at which a D-SR is transmitted, and a specific subframe in whichthe UE transmits a D-SR may be determined according to the parameter anda starting subframe of a configured D-SR resource. dsr-TransMax Theparameter represents the maximum number of times that a D-SR istransmitted, and the purpose of the parameter is to improve thereliability of the D-SR. sr-Componentcarrier The parameter designates anindex of a component carrier for an SR. . . . . . .

Reference is made to FIG. 3 illustrating an example in which a primarycarrier is configured as a dedicated scheduling request resource of auser equipment in the present embodiment particularly as follows.

In a step 301, a base station configures a primary carrier as a carrierresource of a dedicated scheduling request of a user equipment.

If the uplink primary carrier is UE-specific, the base station maydetermine it per UE and use it as the D-SR sending carrier for this UE.If the uplink primary carrier is cell-specific, the eNB can assign thecell-specific primary carrier as the UE-specific dedicated schedulingresource.

In a step 302, a resource index of a PUCCH resource used for carryingdedicated scheduling request will be allocated to the user equipment onthe primary carrier.

In a step 303, the period and offset used to carry the dedicatedscheduling request will be determined for the user equipment.

The allocated resource index of the PUCCH resource together with thedetermined period and offset can be used to deduce the time andfrequency resources for transmitting the dedicated scheduling requestfor this user equipment.

In a step 304, the user equipment is notified by an RRC signaling toinform the configured primary cell and/or the time and frequencyresources for transmitting the dedicated scheduling request.

If UE already knows which uplink component carrier is the primarycarrier, the RRC signaling can only carry the UE-specific D-SR resourceindex, period and subframe offset. The current RRC signaling is enough,not need to be extended.

Reference is made to FIG. 4 illustrating such a solution of theinvention that a carrier resource is chosen according to a load balancecriterion in the present embodiment will be described by way of anexample particularly as follows.

In a step 401, a base station determines uplink component carrierssupported by the user equipment according to capability informationreported from the user equipment.

In a step 402, one uplink component carrier is chosen from the uplinkcomponent carriers supported by the user equipment as a dedicatedscheduling request resource of the user equipment according to a loadbalance criterion dependent upon information on loads of the uplinkcomponent carriers supported by the user equipment.

In a step 403, a resource index of a PUCCH resource on which a dedicatedscheduling request is borne is allocated on the chosen uplink componentcarrier to the user equipment.

In a step 404, a period and an offset at which the user equipmenttransmits the dedicated scheduling request are determined for the userequipment, that is, a specific subframe is configured in which the userequipment transmits the dedicated scheduling request on the chosenuplink component carrier.

In a step 405, the user equipment is notified in an RRC signaling of thechosen uplink component carrier and/or information on configured timeand frequency resources.

A component carrier indication field may be added into an existing RRCsignaling as in the embodiment illustrated in FIG. 2, and reference maybe made to Table 2 for details thereof.

Reference is made to FIG. 5 illustrating such a solution of theinvention that a dedicated scheduling request resource is allocated in afrequency-hopping mode in the present embodiment will be described byway of an example. In the present embodiment, a dedicated schedulingrequest may be hopped in frequency in a group of a part or all of uplinkcomponent carriers in a temporal order of subframes, but a dedicatedscheduling request resource can be allocated on only one uplinkcomponent carrier in a subframe.

In a step 501, a base station determines uplink component carrierssupported by a user equipment according to capability informationreported from the user equipment.

In a step 502, more than one uplink component carriers are chosen fromthe uplink component carriers supported by the user equipment.

In a step 503, a resource index of a PUCCH resource on which a dedicatedscheduling request is borne is allocated on the chosen uplink componentcarriers to the user equipment.

In a step 504, a period and an offset at which the user equipmenttransmits the dedicated scheduling request are determined for the userequipment.

The resource index of the PUCCH resource allocated in the step 503 andthe period and offset determined in the step 504 are used as informationon time and frequency resources configured for the user equipment.

For example, the base station chooses a number N of ones from the uplinkcomponent carriers supported by the UE, where N is larger than one andsmaller than or equal to the number of uplink component carrierssupported by the UE, and determines a carrier allocating in a subframean SR resource according to such a criterion that only one componentcarrier is used in a subframe and switching is performed between thecomponent carriers in the different subframes.

Referring to FIG. 6, the base station chooses four uplink componentcarriers, e.g., CC1, CC2, CC3 and CC4, as a dedicated scheduling requestresource, and configures CC1 with subframes of an uplink subframe 1, anuplink subframe 5 and an uplink subframe 9, configures CC2 withsubframes of an uplink subframe 2 and an uplink subframe 6, configuresCC3 with subframes of an uplink subframe 3 and an uplink subframe 7 andconfigures CC4 with subframes of an uplink subframe 4 and an uplinksubframe 8.

That is, the user equipment may transmit a dedicated scheduling requeston CC1 in the uplink subframes 1, 5 and 9, on CC2 in the uplinksubframes 2 and 6 and on CC3 in the uplink subframes 3 and 7 accordingto the foregoing configuration.

In a step 505, the user equipment is notified in an RRC signaling of thechosen carriers and/or information on the configured time and frequencyresources. Stated otherwise, the base station notifies in an RRCsignaling the location, period and offset of the UE-specific D-SRresource.

Referring to Table 3, an existing RRC signaling may be extended in thepresent embodiment so that the extended RRC signaling includes afrequency-hopping mode indication (hopping-mode) field and a group ofhop component carriers indication (cc-group) field, where the group ofhop component carriers indication field is used to store a group of hopcomponent carriers of the user equipment, and the frequency-hopping modeindication field is used to store time and frequency informationcorresponding to each of the carriers in the group of hop componentcarriers. The carrier information includes the indexs of the carriers ofthe dedicated scheduling request resource or information on frequencypoints of the uplink component carriers as the dedicated schedulingrequest resource of the user equipment. Of course, the frequency-hoppingmode indication field may be omitted if there is only one predefinedhopping mode.

TABLE 3 Parameter The Meaning of Parameter cc-group The parameterrepresents a group of CCs participating in transmitting SR informationof the UE hopping-mode The parameter indicates an SR hopping mode, i.e.,offsets and periods on each of the CCs

Referring to FIG. 7, a method for transmitting a dedicated schedulingrequest according to another embodiment of the invention includes thefollowing steps.

In a step 701, in a system supporting carrier aggregation, a userequipment receives carrier information and information on time andfrequency resources on each carrier of a dedicated scheduling requestresource transmitted from a base station.

In a step 702, a dedicated scheduling request is transmitted on thecorresponding time and frequency resources on the carrier designated bythe base station.

If the user equipment receives an RRC signaling transmitted from thebase station in the step 701, which includes a frequency resourceindication field and/or a time and frequency resource indication field,where the time and frequency resource indication field indicatesinformation on the time and frequency resources on which the dedicatedscheduling request is transmitted, and the information on the time andfrequency resources includes a resource index of a PUCCH resource,period and offset for the dedicated scheduling request.

Furthermore, the RRC signaling may include the maximum number of timesthat the dedicated scheduling request is transmitted.

Then in the step 702, the time and frequency resources used fortransmitting dedicated scheduling request can be deduced from the D-SRstarting subframe and the period and subframe offset in the time andfrequency resource indication field. And then can use the carrierresource indicated in the frequency resource indication field to sendthe dedicated scheduling request.

If the user equipment receives an RRC signaling transmitted from thebase station in the step 701, which includes a frequency-hopping modeindication field and a group of hop component carries indication field,where the group of hop component carriers indication field is used tostore a group of hop component carriers of the user equipment, and thefrequency-hopping mode indication field is used to store an offset and aperiod of a subframe on each carrier in the group of hop componentcarriers.

Then in the step 702, the dedicated scheduling request may betransmitted on the corresponding time and frequency resources on anuplink component carrier in the group of hop component carriers in theRRC signaling, and frequency-hopping may be performed in the time andfrequency resources indicated in the frequency-hopping mode indicationfield.

Referring to FIG. 8, a device for allocating a dedicated schedulingrequest resource according to an embodiment of the invention includes:

a resource allocation unit 81 configured to configure a carrier resourcefor a user equipment according to a preset scheduling criterion, andallocate time and frequency resources on the configured carrierresource, where the carrier resource and the time and frequencyresources are regarded as a dedicated scheduling request resource; and

a notification unit 82 configured to notify the user equipment of thecarrier resource and/or the time and frequency resources.

The dedicated scheduling request resource includes information on timeand frequency resources of one uplink component carrier allocated to theuser equipment at any moment of time.

The resource allocation unit 81 may include:

an uplink carrier choosing unit configured to choose one uplinkcomponent carrier for the user equipment as a carrier for a dedicatedscheduling request of the user equipment according to the presetscheduling criterion;

a time and frequency configuration unit configured to set a subframe forthe chosen uplink component carrier; and

a PUCCH resource index determination unit configured to allocate on thechosen uplink component carrier to the user equipment a resource indexof a PUCCH resource for the dedicated scheduling request.

The uplink carrier choosing unit is configured to determine uplinkcomponent carriers supported by the user equipment according tocapability information reported from the user equipment, and chooserandomly one of the uplink component carriers supported by the userequipment as a carrier for the dedicated scheduling request of the userequipment.

The uplink carrier choosing unit is configured to choose a primarycarrier as a carrier for the dedicated scheduling request of the userequipment.

The uplink carrier choosing unit is configured to determine uplinkcomponent carriers supported by the user equipment according tocapability information reported from the user equipment, and to chooseone of the uplink component carriers supported by the user equipment asa carrier for the dedicated scheduling request of the user equipmentaccording to a load balance criterion dependent upon information onloads of the uplink component carriers supported by the user equipment.

The resource allocation unit 81 may be configured to determine uplinkcomponent carriers supported by the user equipment according tocapability information reported from the user equipment, choose morethan one of the uplink component carriers supported by the userequipment, configure on each of the chosen uplink component carrierscorresponding time and frequency resources on which the user equipmenttransmits the dedicated scheduling request and each of which correspondsto one of the uplink component carriers, and allocate a resource indexof a PUCCH resource on each of the chosen uplink component carriers tothe user equipment.

Referring to FIG. 9, a user equipment according to an embodiment of theinvention includes:

a reception unit 91 configured to receive the carrier and time andfrequency resources information used for transmitting the dedicatedscheduling request resource; and

a dedicated scheduling request transmission unit 92 configured totransmit a dedicated scheduling request on the time and frequencyresources on the carrier designated by the base station.

The reception unit 91 is configured to receive an RRC signalingtransmitted from the base station, which includes a frequency resourceindication filed and a time and frequency resource indication filed. Thefrequency resource indication filed is used to store the D-SR resourceindex and the uplink carrier information for transmitting the dedicatedscheduling request, and the time and frequency resource indication filedincludes the period and subframe offset. And then the dedicatedscheduling request transmission unit 92 is configured to determine thetime and frequency resource as follows: the DSR resource startingsubframe together with the period and offset can be used to deduce thetime and frequency resource for dedicated scheduling request.Transmitting the dedicated resource index on the determined time andfrequency resource of the carrier indicated in the frequency resourceindication filed.

The reception unit 91 is configured to receive an RRC signalingtransmitted from the base station, which includes a frequency-hoppingmode indication field and a group of hop component carries indicationfield, where the group of hop component carriers indication field isused to store a group of hop component carriers of the user equipment,and the frequency-hopping mode indication field is used to store arelationship between a carrier and time for user of carriers in afrequency-hopping mode, and then the dedicated scheduling requesttransmission unit 92 is configured to transmit the dedicated schedulingrequest on the corresponding time and frequency resources on an uplinkcomponent carrier in the group of hop component carriers in the RRCsignaling, and perform frequency-hopping in the time and frequencyresources indicated in the frequency-hopping mode indication field.

In the embodiments of the invention, in a system supporting carrieraggregation, a carrier resource is chosen for a user equipment as adedicated scheduling request resource of the user equipment according toa preset scheduling criterion, and time and frequency resources on thechosen uplink component carrier are designated for a dedicatedscheduling request; and the user equipment is notified of the carrierresource and the time and frequency resources, thereby configuring acarrier and corresponding time and frequency resources on the carrierfor a dedicated scheduling request of the user equipment in the systemsupporting carrier aggregation. Furthermore, a carrier resource may bechosen for the user equipment according to a variety of criteria, andonly some general criteria have been listed in the foregoingembodiments. Of course, alternative criteria will not be precluded,e.g., the locations in frequency domain of uplink component carriers, orthe bandwidths of uplink component carriers, which will not beenumerated here.

It will be appreciated that one skilled in the art may make variousmodifications and alterations to the present invention without departingfrom the scope of the present invention. Accordingly, if thesemodifications and alterations to the present invention fall within thescope of the claims of the present invention and their equivalents, thepresent invention intends to include all these modifications andalterations.

1. A method for allocating a dedicated scheduling request resource,comprising: configuring a carrier resource in a system supportingcarrier aggregation for a user equipment according to a presetscheduling criterion, and allocating corresponding time and frequencyresources on the configured carrier resource, wherein the carrierresource together with the time and frequency resources are regarded asa dedicated scheduling request resource; and notifying the userequipment of the carrier resource and/or the time and frequencyresources.
 2. The method of claim 1, wherein the dedicated schedulingrequest resource comprises: the time and frequency resources allocatedto the user equipment are on one uplink component carrier at any time.3. The method of claim 2, wherein configuring the carrier resource forthe user equipment according to the preset scheduling criterioncomprises: choosing one uplink component carrier for the user equipmentaccording to the preset scheduling criterion; and allocating a PUCCHresource index on the chosen uplink component carrier to the userequipment.
 4. The method of claim 3, wherein choosing one uplinkcomponent carrier for the user equipment according to the presetscheduling criterion comprises: determining uplink component carrierssupported by the user equipment according to UE capability informationreported from the user equipment; and choosing one uplink componentcarrier randomly from the uplink component carriers supported by theuser equipment as the dedicated scheduling request resource of the userequipment.
 5. The method of claim 3, wherein choosing one uplinkcomponent carrier for the user equipment according to the presetscheduling criterion comprises: choosing a primary carrier as thededicated scheduling request resource of the user equipment.
 6. Themethod of claim 3, wherein choosing one uplink component carrier for theuser equipment according to the preset scheduling criterion comprises:determining uplink component carriers supported by the user equipmentaccording to UE capability information reported from the user equipment;and choosing one uplink component carrier from the uplink componentcarriers supported by the user equipment as the dedicated schedulingrequest resource following a load balance criterion and according toload information of each uplink component carrier.
 7. The method ofclaim 2, wherein configuring the carrier resource for the user equipmentaccording to the preset scheduling criterion and allocatingcorresponding time and frequency resources on the configured carrierresource comprises: determining uplink component carriers supported bythe user equipment according to UE capability information reported fromthe user equipment; choosing more than one uplink component carriersfrom the uplink component carriers supported by the user equipment andconfiguring the time and frequency resources used for transmitting thededicated scheduling request on each chosen uplink component carrier,and one time and frequency is related with only one uplink componentcarrier; and configuring the detailed PUCCH resource index on eachchosen uplink component carrier for the user equipment,
 8. The method ofclaim 4, wherein the user equipment is notified in an RRC signaling ofthe carrier resource and/or the time and frequency resources, and theRRC signaling comprises the frequency resource indication field and/ortime and frequency resource indication filed, wherein the frequencyresource indication field is used to store the carrier information forthe dedicated scheduling request and the time and frequency resourceindication filed is used to store the time and frequency resources usedfor transmitting the dedicated scheduling request, and the time andfrequency resources includes the PUCCH resource index, period andoffset, and the RRC signaling further comprises the maximum number oftransmissions that the dedicated scheduling request can be transmitted.9. The method of claim 7, wherein the user equipment is notified in anRRC signaling of the carrier resource and the time and frequencyresources, and the RRC signaling comprises a frequency-hopping modeindication field and a group of hop component carriers indication field,wherein the group of hop component carriers indication field is used tostore the carrier information of the hop component carriers available tothe user equipment, and the frequency-hopping mode indication field isused to store a relationship between a carrier and time for use of thecarriers in a frequency-hopping mode, and the carrier informationcomprises the dedicated scheduling request resource index or thefrequency of the uplink component carrier.
 10. A device for allocating adedicated scheduling request resource, comprising: a resource allocationunit configured to configure a carrier resource for a user equipmentaccording to a preset scheduling criterion, and allocate correspondingtime and frequency resources on the configured carrier resource, whereinthe carrier resource together with the time and frequency resources areregarded as a dedicated scheduling request resource; and a notificationunit configured to notify the user equipment of the carrier resourceand/or the time and frequency resources.
 11. The device of claim 10,wherein the dedicated scheduling request resource comprises: the timeand frequency resources allocated to the user equipment are on oneuplink component carrier at any time.
 12. The device of claim 11,wherein the resource allocation unit comprises: an uplink carrierchoosing unit configured to choose one uplink component carrier for theuser equipment as a carrier for a dedicated scheduling request of theuser equipment according to the preset scheduling criterion; a time andfrequency configuration unit configured to set a corresponding subframefor the chosen uplink component carrier; and a PUCCH resource indexdetermination unit configured to allocate a PUCCH resource index for adedicated scheduling request on the chosen uplink component carrier tothe user equipment.
 13. The device of claim 12, wherein the uplinkcarrier choosing unit is configured to determine uplink componentcarriers supported by the user equipment according to UE capabilityinformation reported from the user equipment, and choose one uplinkcomponent carrier randomly from the uplink component carriers supportedby the user equipment as a carrier for the dedicated scheduling requestof the user equipment; or wherein the uplink carrier choosing unit isconfigured to choose a primary carrier as a carrier for the dedicatedscheduling request of the user equipment; or wherein the uplink carrierchoosing unit is configured to determine uplink component carrierssupported by the user equipment according to UE capability informationreported from the user equipment, and choose one uplink componentcarrier from the uplink component carriers supported by the userequipment as a carrier for the dedicated scheduling request of the userequipment following a load balance criterion and according to loadinformation of each uplink component carrier.
 14. (canceled) 15.(canceled)
 16. The device of claim 11, wherein the resource allocationunit is configured to determine uplink component carriers supported bythe user equipment according to UE capability information reported fromthe user equipment, choose more than one uplink component carriers fromthe uplink component carriers supported by the user equipment, andconfigure on each of the chosen uplink component carriers correspondingtime and frequency resources on which the user equipment transmits adedicated scheduling request and one time and frequency is related withonly one uplink component carrier, and allocate a resource index of aPUCCH resource on each of the chosen uplink component carriers to theuser equipment.
 17. A method for transmitting a dedicated schedulingrequest, comprising: receiving, by a user equipment in a systemsupporting carrier aggregation, carrier information and correspondingtime and frequency resources information of a dedicated schedulingrequest resource transmitted from a base station; and transmitting adedicated scheduling request on the corresponding time and frequencyresources on the carrier designated by the base station.
 18. The methodof claim 17, wherein receiving by the user equipment the carrierinformation and the corresponding time and frequency resourcesinformation of the dedicated scheduling request resource transmittedfrom the base station comprises: receiving, by the user equipment, anRRC signaling transmitted from the base station, which comprises afrequency resource indication field and a time and frequency resourceindication field, wherein the frequency resource indication field isused to store a resource index of the dedicated scheduling requestresource and a frequency of one uplink component carrier as thededicated scheduling request resource of the user equipment, and thetime and frequency resource indication field is used to indicate theinformation on the time and frequency resources on which the dedicatedscheduling request is transmitted, and the time and frequency resourcescomprise a resource index of a PUCCH resource, a period and an offsetfor the dedicated scheduling request, and the RRC signaling furthercomprises the maximum number of transmissions that the dedicatedscheduling request can be transmitted.
 19. The method of claim 18,wherein transmitting the dedicated scheduling request on thecorresponding time and frequency resources on the carrier designated bythe base station comprises: determining the time and frequency resourceson which the dedicated scheduling request is transmitted according tothe period and the offset in the time and frequency resource indicationfield and a preset starting subframe on which the dedicated schedulingrequest is transmitted; and transmitting the dedicated schedulingrequest on the determined time and frequency resources on the carrierresource indicated in the frequency resource indication field.
 20. Themethod of claim 17, wherein receiving by the user equipment the carrierinformation and the corresponding time and frequency resourcesinformation of the dedicated scheduling request resource transmittedfrom the base station comprises: receiving, by the user equipment, anRRC signaling transmitted from the base station, which comprises afrequency-hopping mode indication field and a group of hop componentcarries indication field, wherein the group of hop component carriersindication field is used to store the carrier information of the hopcomponent carriers available to the user equipment, and thefrequency-hopping mode indication field is used to store a relationshipbetween a carrier and time for use of the carriers in afrequency-hopping mode.
 21. The method of claim 20, wherein transmittingthe dedicated scheduling request on the corresponding time and frequencyresources on the carrier designated by the base station comprises:transmitting the dedicated scheduling request on the corresponding timeand frequency resources on an uplink component carrier in the hopcomponent carriers in the RRC signaling, and performingfrequency-hopping in the time and frequency resources indicated in thefrequency-hopping mode indication field.
 22. (canceled)
 23. (canceled)24. (canceled)
 25. (canceled)
 26. (canceled)
 27. The method of claim 6,wherein the user equipment is notified in an RRC signaling of thecarrier resource and/or the time and frequency resources, and the RRCsignaling comprises the frequency resource indication field and/or timeand frequency resource indication filed, wherein the frequency resourceindication field is used to store the carrier information for thededicated scheduling request and the time and frequency resourceindication filed is used to store the time and frequency resources usedfor transmitting the dedicated scheduling request, and the time andfrequency resources includes the PUCCH resource index, period andoffset, and the RRC signaling further comprises the maximum number oftransmissions that the dedicated scheduling request can be transmitted.